- 1 parcels are rated as (1) VERY SIGNIFICANT, which retain very good integrity; they are one-of-a-kind or unique properties.
- 517 parcels are rated as (2) SIGNIFICANT, which retain good integrity, contributing to the historic character of Grass Valley.
- 437 parcels are rated as (3) LACK SIGNIFICANCE, where major alterations or additions have dropped the integrity level; the rating may be recoverable through restoration.
- 272 parcels are rated as (4) MODERN INFILL, where historic fabric is not present.
Related Content:historic, maps